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Bracewellite & Eskolaite

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SKY1043216

Bracewellite & Eskolaite

Type Locality

Description Tabs

Description
Locality: 
Merume River, Kamakusa, Potaro-Siparuni Region, Guyana
Class: 
Crystal Group/Cluster
Size Range: 
Micromount (under 1cm)
Size: 
0.25 × 0.2 × 0.2 cm
Description

Microinclusions of very rare brownish black bracewellite from the type locality and only one of two localities known worldwide in eskolaite.

Bracewellite is Chromium oxide-hydroxide.

Ex Vandenbroucke Museum collection from Waregem, Belgium.

Mineral Data
What's on the rock

Bracewellite

Formula: 
CrO(OH)
Strunz: 
4.FD.10
Crystal System: 
Orthorhombic
Hardness: 
5.5 - 6.5
Type Locality: 
Merume river, Kamakusa, Mazaruni District, Guyana

Eskolaite

Formula: 
Cr2O3
Strunz: 
4.CB.05
Crystal System: 
Trigonal
Hardness: 
8.0 - 8.5
Colour: 
Black
Streak: 
Green
Type Locality: 
Outokumpu Cu-Co-Zn-Ni-Ag-Au ore field, Eastern Finland Region, Finland

Current price

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30
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Start 22 Apr 18:00
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Spain
6
Europe
9
Rest of the World
10

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